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Amana GDH8 Installation Instructions Manual: Cooling Mode; Fan Only Mode; Tart Up Rocedure Nd; Furnace Operation

Gas furnace.
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Circulator blower is de-energized following a heat off delay
period (selectable 100 or 150 seconds; factory set at
150 seconds).
If the furnace is operating in the low-stage heating mode
when thermostat contacts open, circulator remains at
low heat speed for the selected delay off period.
If the furnace is operating in high-stage heating mode
when the thermostat contacts open, the circulator blower
remains at high heat speed for the selected heat off delay
period.
Furnace awaits the next call from thermostat.
C
M
OOLING
ODE
The normal operational sequence in cooling mode is as fol-
lows:
R and Y thermostat contacts close, initiating a call for
cool.
Integrated control module performs safety circuit checks.
Outdoor fan and compressor are energized.
Circulator blower is energized on cool speed following a
fixed five second on delay. Electronic air cleaner
terminals are energized with circulator blower.
Furnace circulator blower and outdoor cooling unit run,
integrated control module monitors safety circuits
continuously.
R and Y thermostat contacts open, completing the call
for cool.
Outdoor fan and compressor are de-energized.
Circulator blower is de-energized following a fixed forty
five second cool off delay period. Electronic air cleaner
terminals are de-energized.
Furnace awaits the next call from thermostat.
F
O
M
AN
NLY
ODE
The normal operational sequence in fan only mode is as fol-
lows:
R and G thermostat contacts close, initiating a call for
fan.
Integrated control module performs safety circuit checks.
Circulator blower is energized on low heat speed.
Electronic air cleaner terminals are energized.
Circulator blower runs, integrated control module
monitors safety circuits continuously.
R and G thermostat contacts open, completing the call
for fan.
Circulator blower is de-energized. Electronic air cleaner
terminals are de-energized.
Furnace awaits the next call from thermostat.
S
-
P
TART
UP
ROCEDURE
Furnace must have a 115 VAC power supply properly connected
and grounded. Proper polarity must be maintained for correct
operation. An interlock switch prevents furnace operation if the
blower door is not in place. Keep the blower access door in
place except for inspection and maintenance.
This furnace is also equipped with a self-diagnosing electronic
control module. In the event a furnace component is not operat-
ing properly, the control module LED will flash on and off in a
factory-programmed sequence, depending on the problem en-
countered. This light can be viewed through the observation
window in the blower access door. Refer to the Troubleshoot-
ing Chart for further explanation of the lighting codes.
Follow the start-up and adjustment items, refer to further infor-
mation in Section XIII, Operational Checks (see table of con-
tents, pages 2-3 for page number)..
F
URNACE OPERATION
Purge gas lines of air prior to start-up. Do not purge lines into
an enclosed burner compartment.
Check for leaks using an approved chloride-free soap and wa-
ter solution, an electronic combustible gas detector, or other
approved method. Verify that all required kits (propane gas,
high altitude, etc.) have been appropriately installed.
NOTE: An interlock switch prevents furnace operation if the
blower door is not in place. Keep the blower access doors in
place except for inspection and maintenance.
F
S
-
URNACE
TART
UP
1. Close the manual gas shutoff valve external to the furnace.
2. Turn off the electrical power to the furnace.
3. Set the room thermostat to the lowest possible setting.
4. Remove the burner compartment door.
NOTE: This furnace is equipped with an ignition device which
automatically lights the burner. Do not try to light the burner by
hand.
5. White-Rodgers valves: Push the switch to the OFF
position.
Honeywell valves: Slide the switch to the OFF position.
6. Wait five minutes to clear out any gas. Then smell for
gas, including near the floor.
7. If gas can be smelled following the five minute waiting
period in Step 6, immediately follow the instructions on
Page 3 of this manual. If you do not smell gas after five
minutes:
White-Rodgers valves: Push the switch to the ON
position.
Honeywell valves: Slide the switch to the ON position.
25
A
A
ND

DJUSTMENT

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